Kristen Stewart Talks Going Topless For "On The Road"

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"Once we got to set, it was so about just breathing and letting it happen. He put so much trust in us," she said of her director. "So it was like, 'OK, so I have to take my clothes off?' It's so not a big [deal]."

"In the four-week rehearsal process, it was okay to ask any question, to bring up any story, to really overanalyze everything and intellectualize everything," she added.

The actress, who will next been seen in the final "Twilight" installment, "Breaking Dawn – Part 2," said she and her "On The Road" co-stars (Garrett Hedlund, Kirsten Dunst and Sam Riley) were completely entrenched in their roles and so prepared that they were given the freedom to improvise lines for their characters – a feat she found more intimidating than going topless.

"Once we got to set, it was so about just breathing and letting it happen. He put so much trust in us," she said of her director. "So it was like, 'OK, so I have to take my clothes off?' It's so not a big [deal]."